To code on both, do something you care about as your startup. _really_ care about. Also, there is lots to do. Do whatever seems most fun to you at the time. By

To code on both, do something you care about as your startup. _really_ care about. Also, there is lots to do. Do whatever seems most fun to you at the time. By the time you are forced to do things for clients, you'll have enough code and good habits formed to manage it. To stay sane, set strict rules about time off. For me, Friday night and Saturday (all day and night) are family time. Sunday is totally Gridspy time. If I start to feel tired, admit it and remind yourself that you can ship one month later and take a few days off here and there.